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A188161 as a simple table

na(n)
05
111
235
3131
4515
52051
68195
732771
8131075
9524291
102097155
118388611
1233554435
13134217731
14536870915
152147483651
168589934595
1734359738371
18137438953475
19549755813891
202199023255555
218796093022211
2235184372088835
23140737488355331

[5,11,35,131,515,2051,8195,32771,131075,524291,
 2097155,8388611,33554435,134217731,536870915,
 2147483651,8589934595,34359738371,137438953475,
 549755813891,2199023255555,8796093022211,
 35184372088835,140737488355331]